10pcs L-shape 4 holes 1010 aluminum corner connector are used for most brands of aluminum profiles
Package include: 10pcs 78x78mm 10 series bracket, 40pcs screws and nuts.
7mm thick, It's thick enough to support your project, material: aluminum alloy.
Fit 1 inch x 1 inch series aluminum extrusion profile, used to connect pieces of 1" or 25mm aluminum extrusion at a 90 degree angle.